diff --git a/stk500v2/main.cpp b/stk500v2/main.cpp
index c8f0b35..73cf410 100644
--- a/stk500v2/main.cpp
+++ b/stk500v2/main.cpp
@@ -21,9 +21,9 @@ struct Message {
 	uint8_t checksum;
 };
 
-static inline bool receiveByte(uint8_t &data, uint16_t timeout = 1000)
+static inline bool receiveByte(uint8_t &data, uint32_t timeout = 100000)
 {
-	for (uint16_t i = 0; i < timeout; ++i) {
+	for (uint32_t i = 0; i < timeout; ++i) {
 		if (serial.rxByte(data))
 			return true;
 	}